The Pre-Algebra Tutor DVD series teaches the fundamentals of pre-algebra through step-by-step example problems that progress in difficulty. Emphasis is placed on giving students confidence in their skills by gradual repetition so that the skills learned are committed to long term memory.This program covers the important topic of teaching students the concept of an exponent and how they fit into pre-algebra. Students learn how to write exponents and how to expand them into the multiplication of the base number. Grades 9-College. 42 minutes on DVD.